Screen debug graph types

Synopsis:

#include <screen/screen.h>

 enum {
      SCREEN_DEBUG_GRAPH_FPS = (1 << 0)   
      SCREEN_DEBUG_GRAPH_POSTS = (1 << 1)   
      SCREEN_DEBUG_GRAPH_BLITS = (1 << 2)   
      SCREEN_DEBUG_GRAPH_UPDATES = (1 << 3)   
      SCREEN_DEBUG_STATISTICS = (1 << 4)   
};

Data:

SCREEN_DEBUG_GRAPH_FPS: Frames per second; the number of posts over time.

SCREEN_DEBUG_GRAPH_POSTS: Pixel count of pixels in dirty rectangles over time.

SCREEN_DEBUG_GRAPH_BLITS: Pixel count of pixels that were in blit requests over time.

SCREEN_DEBUG_GRAPH_UPDATES: Pixel count of pixels used by composition manager in the window to update the framebuffer over time.

SCREEN_DEBUG_STATISTICS

Certain staticstics of a window.

The statistics are updated once per second and therefore represent a one second average. The statistics that are displayed are:

cpu usage, cpu time, gpu time
private mappings, free memory
window fps, display fps
events
objects
draws
triangles
vertices

Library:

libscreen

Description:

All masks except @c #SCREEN_DEBUG_STATISTICS are intended to be combined in a single integer bitmask representing combinations of desired debug graphs to be displayed. Only one window can enable debug graphs at a time; the last window to have enabled debug will have its values displayed in the graph. All data but the FPS is normalized to buffer size and refresh rate of display.